/*
 * Copyright (C) 2013 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing.google;

import static com.google.common.collect.testing.Helpers.assertContains;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.Multimap;
import com.google.common.collect.testing.Helpers;
import com.google.common.collect.testing.features.MapFeature;

import java.util.Collection;

import org.junit.Ignore;

/**
 * Tester for {@link Multimap#putAll(Multimap)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public class MultimapPutAllMultimapTester<K, V>
        extends AbstractMultimapTester<K, V, Multimap<K, V>>
{
    @MapFeature.Require(absent = SUPPORTS_PUT)
    public void testPutUnsupported()
    {
        try
        {
            multimap().putAll(getSubjectGenerator().create(Helpers.mapEntry(k3(), v3())));
            fail("Expected UnsupportedOperationException");
        }
        catch (UnsupportedOperationException expected)
        {
        }
    }

    @MapFeature.Require(SUPPORTS_PUT)
    public void testPutAllIntoEmpty()
    {
        Multimap<K, V> target = getSubjectGenerator().create();
        assertEquals(!multimap().isEmpty(), target.putAll(multimap()));
        assertEquals(multimap(), target);
    }

    @MapFeature.Require(SUPPORTS_PUT)
    public void testPutAll()
    {
        Multimap<K, V> source =
                getSubjectGenerator().create(Helpers.mapEntry(k0(), v3()), Helpers.mapEntry(k3(), v3()));
        assertTrue(multimap().putAll(source));
        assertTrue(multimap().containsEntry(k0(), v3()));
        assertTrue(multimap().containsEntry(k3(), v3()));
    }

    @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
    public void testPutAllWithNullValue()
    {
        Multimap<K, V> source = getSubjectGenerator().create(Helpers.mapEntry(k0(), null));
        assertTrue(multimap().putAll(source));
        assertTrue(multimap().containsEntry(k0(), null));
    }

    @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
    public void testPutAllWithNullKey()
    {
        Multimap<K, V> source = getSubjectGenerator().create(Helpers.mapEntry(null, v0()));
        assertTrue(multimap().putAll(source));
        assertTrue(multimap().containsEntry(null, v0()));
    }

    @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
    public void testPutAllRejectsNullValue()
    {
        Multimap<K, V> source = getSubjectGenerator().create(Helpers.mapEntry(k0(), null));
        try
        {
            multimap().putAll(source);
            fail("Expected NullPointerException");
        }
        catch (NullPointerException expected)
        {
        }
        expectUnchanged();
    }

    @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEYS)
    public void testPutAllRejectsNullKey()
    {
        Multimap<K, V> source = getSubjectGenerator().create(Helpers.mapEntry(null, v0()));
        try
        {
            multimap().putAll(source);
            fail("Expected NullPointerException");
        }
        catch (NullPointerException expected)
        {
        }
        expectUnchanged();
    }

    @MapFeature.Require(SUPPORTS_PUT)
    public void testPutAllPropagatesToGet()
    {
        Multimap<K, V> source =
                getSubjectGenerator().create(Helpers.mapEntry(k0(), v3()), Helpers.mapEntry(k3(), v3()));
        Collection<V> getCollection = multimap().get(k0());
        int getCollectionSize = getCollection.size();
        assertTrue(multimap().putAll(source));
        assertEquals(getCollectionSize + 1, getCollection.size());
        assertContains(getCollection, v3());
    }
}
